The SolarEdge SEAUTO-TX-5000 auto transformer is designed to be paired with a StorEdge inverter for SolarEdge systems including battery storage. The SEAUTO-TX-5000 is required for any StorEdge system with batteries and is designed to regulate AC power for your critical loads during a power outage. The StorEdge system is compatible with 350VDC batteries including the Tesla Powerwall home battery.